This is a note to let you know that I've just added the patch titled
kcsan: avoid passing -g for test
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kcsan-avoid-passing-g-for-test.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5eb39cde1e2487ba5ec1802dc5e58a77e700d99e Mon Sep 17 00:00:00 2001
From: Marco Elver <elver@xxxxxxxxxx>
Date: Thu, 16 Mar 2023 23:47:05 +0100
Subject: kcsan: avoid passing -g for test
From: Marco Elver <elver@xxxxxxxxxx>
commit 5eb39cde1e2487ba5ec1802dc5e58a77e700d99e upstream.
Nathan reported that when building with GNU as and a version of clang that
defaults to DWARF5, the assembler will complain with:
Error: non-constant .uleb128 is not supported
This is because `-g` defaults to the compiler debug info default. If the
assembler does not support some of the directives used, the above errors
occur. To fix, remove the explicit passing of `-g`.
All the test wants is that stack traces print valid function names, and
debug info is not required for that. (I currently cannot recall why I
added the explicit `-g`.)
Link: https://lkml.kernel.org/r/20230316224705.709984-2-elver@xxxxxxxxxx
Fixes: 1fe84fd4a402 ("kcsan: Add test suite")
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reported-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/kcsan/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/kcsan/Makefile
+++ b/kernel/kcsan/Makefile
@@ -16,6 +16,6 @@ obj-y := core.o debugfs.o report.o
KCSAN_INSTRUMENT_BARRIERS_selftest.o := y
obj-$(CONFIG_KCSAN_SELFTEST) += selftest.o
-CFLAGS_kcsan_test.o := $(CFLAGS_KCSAN) -g -fno-omit-frame-pointer
+CFLAGS_kcsan_test.o := $(CFLAGS_KCSAN) -fno-omit-frame-pointer
CFLAGS_kcsan_test.o += $(DISABLE_STRUCTLEAK_PLUGIN)
obj-$(CONFIG_KCSAN_KUNIT_TEST) += kcsan_test.o
Patches currently in stable-queue which might be from elver@xxxxxxxxxx are
queue-6.2/kcsan-avoid-passing-g-for-test.patch
queue-6.2/mm-kfence-fix-using-kfence_metadata-without-initialization-in-show_object.patch
queue-6.2/kfence-avoid-passing-g-for-test.patch
